Defect Code 06

Defect Code 06:

Failure of Individual Check-Control Signal Generator Systems:

Notes:

A complete list of signal generator systems is provided in the chapter - Functional Description.

In compliance with this diagnostic procedure, there is a fault when the signal generator signals a system as being defective although the system is OK in the vehicle or when the system in the vehicle is defective but the signal generator does not detect a fault.

The check-control text display in the instrument cluster is mainly linked to a sensor of additional conditions (engine speed, vehicle speed, time conditions). The signal generator system should therefore only be checked with the BMW DIAGNOSTIC SYSTEM (display without additional conditions).

General Troubleshooting:

- not applicable to oil level switch, EGS, ASC, AHM -

1. Detach connector at signal generator. Alternately connect wire to check control module (CCM) or instrument cluster directly to ground or interrupt. The display should change between "OK" and "not OK". If the display does not change, check wire to the CCM or to the instrument cluster and repair if necessary. If wire is OK, renew CCM or instrument cluster electronic assembly.
2. Using suitable lead, alternately bypass or interrupt Pin 1 and Pin 2 of connector. The display should change between "OK" and "not OK". If the display does not change, the ground connection is defective. Repair wire.
3. If the display changes correctly when bypassing Pin 1 and Pin 2, the signal generator is defective.

Troubleshooting Engine Oil Level Switch:

1. Complete defect detection with BMW DIAGNOSTIC SYSTEM.
2. If both sensors (static and dynamic) are displayed as being defective), check ground wire to the 3-pin connector of the oil level switch Pin 2 and repair if necessary.
3. Checking the engine oil level switch: Detach 3-pin connector.

Measure resistance at plug part of oil level switch.

Nominal values:

Between Pin 2 and Pin 3 < 1 Ohm.
Between Pin 2 and Pin 1 = approx. 1K Ohm

Renew defective oil level switch.

Troubleshooting Trailer Module (AHM):

1. Defect signal although no trailer module (AHM) installed: Check short-circuit jumper at 6-pin connector in luggage compartment (on left, behind trim panel), repair if necessary. If jumper is OK, repair wire to CCM connector (green) Pin 9.
2. Trailer module (AHM) installed: Check trailer module (AHM) main fuse in the front power distribution box and repair if necessary.
3. Trailer module (AHM) main fuse OK: Check all light fuses in the AHM, repair defective fuses. Installation location AHM: Left of luggage compartment, behind trim panel.
4. Fuses OK: Detach 6-pin connector between AHM and vehicle wire harness. Connect jumper between Pin 5 and Pin 6 (wire end vehicle wire harness). If the trailer module (AHM) is now shown as OK, replace trailer module.
5. Defect displayed despite bypass: Check ground wire to trailer module (AHM) and wire to CCM connector (green) Pin 9 and repair if necessary.

Troubleshooting EGS/ASC Messages:

1. Check EGS or ASC.
2. If EGS or ASC OK: Check wire from CCM to control unit and repair if necessary.